Because Reasons (2018)

Tiffany's not bad. She's just bored. Tiffany is an all-American dream. Her mother is a successful lawyer. Her father is a CEO. She has perfect social skills. Her mind is sharp. Her instincts Killer. Unfortunately, Tiffany has a problem. She's so very bored. She has no idea what she's going to do with her life. That is, until the night her mother dies right before her eyes. That night Tiffany decides she's going to go out and have some real fun. Some blood-soaked fun. Fun is powerful and power is legit. Because being bored is worse than being dead. Because reasons.